The disclosure relates to a device (200) for updating an initial backoff parameter (ECW min ), the device comprising: a monitoring stage (201), configured to monitor, during a monitoring interval, a plurality of data transmissions of a plurality of WLAN devices; an identification stage (202), configured to identify a number of successful data transmissions from the plurality of data transmissions; a derivation stage (203), configured to derive a weighting function based on successful data transmissions; a weighting stage (204), configured to weight the initial backoff parameter (ECW min ) of the monitoring interval with the weighting function to provide a weighted backoff parameter (ECW AVR or Average Re-Tx); and an updating stage (205), configured to update the initial backoff parameter (ECW min ) for a next monitoring interval based on the weighted backoff parameter (ECW AVR ).